/* EduAssistant StudentsWeb Main Stylesheet */

/* Import external dependencies */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@500;600;700&display=swap');

/* Import design system */
@import 'design-system/colors.css';
@import 'design-system/typography.css';
@import 'design-system/components.css';
@import 'design-system/utilities.css';

/* Reset and base styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--neutral-700);
    background-color: var(--neutral-50);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-hover);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

::selection {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }

    body {
        background: white;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* Specific page styles */

/* Home Page */
.welcome-banner {
    background-color: var(--primary-light);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-bottom: 2rem;
}

/* Topics Page */
.topic-filters {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.topics-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .topics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .topics-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Topic Detail Page */
.topic-header {
    margin-bottom: 2rem;
}

.topic-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 1024px) {
    .topic-content {
        grid-template-columns: 2fr 1fr;
    }
}

.topic-materials {
    margin-bottom: 2rem;
}

.topic-sidebar {
    position: sticky;
    top: 2rem;
}

/* Learning Material Page */
.material-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--neutral-200);
}

.material-content {
    margin-bottom: 2rem;
}

.material-completion {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--neutral-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
/* Preview mode styles */
.preview-mode .material-card {
    position: relative;
}

.preview-mode .material-card.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.preview-mode .material-card.disabled::after {
    content: '\f023';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: 50%;
    right: 1rem;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: #6b7280;
}

/* Public/Private badges */
.material-visibility-badge {
    font-size: 0.75rem;
    padding: 0.25rem 0.5rem;
}

/* Preview mode alert styling */
.alert-preview {
    background-color: #eff6ff;
    border-color: #3b82f6;
    color: #1e40af;
}

.alert-preview .btn-primary {
    background-color: #3b82f6;
    border-color: #3b82f6;
}

.alert-preview .btn-outline-primary {
    color: #3b82f6;
    border-color: #3b82f6;
}
}

/* Quiz Page */
.quiz-header {
    margin-bottom: 2rem;
}

.quiz-timer {
    font-weight: var(--font-semibold);
    font-size: var(--text-xl);
    color: var(--neutral-700);
}

.question-container {
    margin-bottom: 2rem;
}

.answer-feedback {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
}

.answer-feedback.correct {
    background-color: var(--success-light);
    border-left: 4px solid var(--success);
}

.answer-feedback.incorrect {
    background-color: var(--error-light);
    border-left: 4px solid var(--error);
}

/* Progress Page */
.progress-overview {
    margin-bottom: 2rem;
}

.progress-card {
    margin-bottom: 1.5rem;
}

.progress-chart {
    margin-bottom: 2rem;
}

/* Mobile Navigation */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--neutral-200);
}

.mobile-menu-content {
    padding: 1rem;
}

.mobile-menu-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 1rem;
    border-top: 1px solid var(--neutral-200);
}

/* Feedback Modal */
.feedback-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.feedback-modal.open {
    opacity: 1;
    visibility: visible;
}

.feedback-modal-content {
    background-color: white;
    border-radius: 0.75rem;
    padding: 2rem;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

/* Animations */
.skeleton-loader {
    background: linear-gradient(
            90deg,
            var(--neutral-200) 25%,
            var(--neutral-100) 50%,
            var(--neutral-200) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}